Free Funding Rates API

Endpoints

Examples

curl https://xoomar.com/api/markets/funding-rates

import requests

r = requests.get("https://xoomar.com/api/markets/funding-rates")
data = r.json()["data"]
for row in data:
    print(f"{row['baseAsset']} {row['exchange']}: {row['fundingRate']}")

const res = await fetch("https://xoomar.com/api/markets/funding-rates");
const { data } = await res.json();
console.log(data);

Limits

• Snapshots update every 60 seconds. This is NOT tick-level data.
• Settled funding history starts in 2019 for the major pairs on Binance.
• Not suitable for HFT or sub-second strategies.
• 10 requests a minute without a key, 30 with a free key.

Main features

• Live funding rates for every tracked perpetual on five venues, updated every 60 seconds; each row carries the rate as published, the settlement interval in hours, the 8-hour equivalent and the annualized figure.
• Cross-venue comparison in one call: the same coin's rate on every venue side by side (use fundingRate8h to compare hourly and 8-hour venues).
• Settled funding history on the per-symbol endpoint, up to 5,000 settlements a call.
• Mark price, 24h price change, open interest and next funding time in the same row, so one request fills a dashboard widget.

Example

Request

curl "https://xoomar.com/api/markets/funding-rates"

Response, live at 2026-10-15 16:23 UTC, trimmed

{
  "data": [
    {
      "slug": "btc",
      "baseAsset": "BTC",
      "exchange": "okx",
      "markPrice": "82284.30000000",
      "fundingRate": "0.0000402047",
      "nextFundingTime": "2026-10-16T00:00:00.000Z",
      "openInterest": "30506.73620000",
      "openInterestValue": "2510405423.2452",
      "longShortRatio": null,
      "priceChangePct24h": "0.008705",
      "fundingIntervalHours": 8,
      "fundingRate8h": 0.0000402047,
      "fundingAnnualized": 0.044024
    },
    {
      "slug": "btc",
      "baseAsset": "BTC",
      "exchange": "hyperliquid",
      "markPrice": "82285.00000000",
      "fundingRate": "0.0000125000",
      "nextFundingTime": "2026-10-15T17:00:00.000Z",
      "openInterest": "39248.97738000",
      "openInterestValue": "3229602103.7133",
      "longShortRatio": null,
      "priceChangePct24h": "0.006988",
      "fundingIntervalHours": 1,
      "fundingRate8h": 0.0001,
      "fundingAnnualized": 0.1095
    }
  ],
  "updatedAt": "2026-10-15T16:23:06.283Z",
  "source": "xoomar.com",
  "docs": "https://xoomar.com/markets/api",
  "license": "https://xoomar.com/terms",
  "attribution": "Credit XOOMAR with a link to the dataset page on xoomar.com when you republish this data",
  "meta": {
    "source": "Binance, Bybit, OKX, Hyperliquid, Kraken Futures",
    "sourceAttribution": "Funding rate data: Binance, Bybit, OKX, Hyperliquid and Kraken Futures.",
    "notice": "10 requests a minute without a key, 30 with a free key. Get a free key at https://xoomar.com/signup?utm_source=api, register your app at https://xoomar.com/developers/register?utm_source=api, and credit the data as \"Data: XOOMAR\" together with the sourceAttribution line."
  }
}

openInterest can be null on some rows; treat it as nullable.

What people build with it

Response shape

Every endpoint returns the same JSON envelope: { data, updatedAt, source, docs, license, attribution, meta }. In meta, source names who publishes the data and sourceAttribution is the credit line to show with it. The data field is an array of records with these fields:

One row per symbol per exchange. The per-symbol endpoint /api/markets/funding-rates/{slug} returns { current, history }; history is null unless you pass history=30d, 1y or all, and holds up to 5,000 settlements, newest first.

Numeric fields typed string in the table carry exact decimals; parse them with your language's decimal type. No key needed to start: 10 requests a minute per IP without a key and 30 a minute with a free account key, with at least six months of history. A 429 response carries a Retry-After header in seconds. Credit XOOMAR with a link to the dataset page when you republish the data; the data terms are on the terms page.

A free account key raises the limit; send it in an X-API-Key header.